Currently there is no way to INCREASE or DECREASE the colour temperature by a set amount, just to SET it to a specified value.
I, for example, want to use an IKEA N2 button to control 3 lights and would like to be able to increase and decrease the colour temperature from said button.
Google brought me here: I also want to use the left and right buttons of a tradfri remote to adjust the color temperature (this is also the default if the remote is used with the bulb without home assistant). It would be great if there was an action for that.
That is what I found as an alternative, but having an action to change the color temp would be way easier: